Hondas almost always have the best ads, and you have to love the euro spec ones even more than the US ones.

I guess, however I've always been a fan of the Lexus comercials. But I think the award for the best USDM car commercial has to go to the new Infiniti commercials. You know, the ones that end with the brush stroke(G35 and the FX45)? They're simply awesome.